It is not Seguso IMHO, it does look like the fairly recent wares that are made in China.

These large bright, heavy and colourful vases can be found in every antiques centre in the country, invariably they are described as Murano. They lack the finesse that would be expected from high quality production from Murano, shapes are often a little crude as is the general execution of the piece. They have been imported in large quantities so there are plenty in circulation.